Seattle-based Trumba said today that it has added PRO Sports Club, a local sports club in the Seattle/Bellevue area, as a customer. PRO Sports will use the firm's online calendar to increase awareness of and attendance at its classes and events. Financial size of the deal were not announced. Trumba is a venture-backed startup backed by Kleiner Perkins Caufield & Byers, August Capital and Oak Investment Partners.